Proportioning system



Oct. 26, 1937. J. coRYDoN PROPORTIONING SYSTEM Filed Dec. 28. 1934 INVENTOR 7^ 36 and 31 extend to the common discharge pipe I8, conventional check valves 38 and 39 being provided in the intake and discharge sides of each of the pumps and surrounded bythe fluid in the safety chamber 2|. By providing a common discharge pipe I8 for the poisonousreagent A and the highly visible dye B, I make it impossible to feed ythe poisonous reagent A without having its presence visibly indicated by dye B.

The valve means I3 which is actuated by the controller I2 preferably comprises a single reciprocating valve piston 4U reciprocable in a cylinder 4I and governing the flow of pressure fluid to and from both of the motor cylinders 26. The pressure uid may, if desired, be taken from the main conduit II on the high-pressure, or discharge, side of centrifugal pump I0, supply line 42 being provided for this purpose. From the valve cylinder 4I branched outlets 43 and 44 extend, the conduit 43 having branches 43 and 43" connected to upper ends of the two motor cylinders 26, while branches 44' and 44" of the conduit 44 are connected to the lower ends of the two motor cylinders 26.

Common exhaust line 45 extends from the valve cylinder 4I adjacent the ends thereof to main conduit II on the low-pressure, or suction side of centrifugal pump I0. In the reciprocation of the valve piston member 40, the pressure and exhaust connections of the two conduits 43 and 44 are alternated to cause simultaneousreciproc'ation of the two pumps I4 and I5.

Controller I2, for controlling the reciprocation of valve means I3, may be described as follows. The main conduit II isconnected to opposite sides of mechanical meter 46 so that the main flow passes therethrough to correspondingly actuate the upwardly projecting end of the meter shaft 41. Upon the top of the meter 46 a gear box 48 is mounted, and a stub shaft 49 extending downwardly frorn within the gear box is connected to the upwardly projecting end of the 'meter\shaft 41 for actuation thereby. Within the box 48 a pinion 50 is removably fixed on the shaft 49 in mesh with a gear formed on a cam sleeve I, which .sleeve is rotatably mounted on a vertical stud 52. On the upper end of the cam sleeve 5I, an eccentric cam 53 is provided to engage and actuate a cam roller 54 which is carred by the end of the valve piston member 40. The valve cylinder 4I is, in the present instance, carried by the gear box 48 exteriorly thereof and the valve member 4Q extends through the side of the gear box toward the cam 53. A spring 55 acting between the box and the valve member urges the roller into engagement with the cam.

'I'he quantities of reagent A and dye B injected during each pump stroke may, of course, be varied by adjustment of the stops 3|, which adjustment may also be used to vary the proportion of reagent A to dye B.

I claim: f

1. In a'proportioning system; the combination of a main conduit; means operable in response to the now in said conduit; substance feeding means having a stationary part and a movable part, said feeding means being enclosed within a safety chamber, said feeding means having an actuator located in part outside of said safety chamber and being controlled by said ow reysponsive means to correspondingly govern the rate of actuation of said feeding means; and

means partially without said safety .chamber for individually adjusting the feed rate of said feeding means.

2. In a. proportioning system having a main conduit for a master fluid flowing therein under positive pressure and metering means in said conduit' for said fluid, the combination of means for injecting a dependent fluid into said conduit, means for supplying said dependent uid to said injecting means under negative pressure, a safety chamber connected to said main conduit so that said master uid may flow scouringly therethrough and containing all portions of said dependent fiuid injecting means as may at any time contain said dependent fluid under positive pressure.

3. In a proportioning system for injectinga dangerous fluid into a master fluid, the combination of a conduit for fiowing said master fluid therethrough under positive pressure, flow responsive means in said conduit, supply means for said dangerous fluid, means for injecting said dangerous fluid into said conduit, and a safety chamber for at least all portions of said injecting means that may contain said dangerous fluid under positive pressure, said chamber being arranged to harmlessly carry away any leakage from said injecting means.

4. In a proportioning system as set forth in claim 2 in which said safety chamber is so connected to said conduit that the main iiow of said master fluid passes through said safety chamber.

5. In a proportioning system as set forth in claim 3 in which said supply means exterior of said safety chamber generally depends therefrom and is free from any movable check-valvelike obstruction so that positive pressure may not exist even though said dangerous fluid injecting means fail to completely check the pressure of said dangerous liquid.

6. In a proportioning' system, the combination of a conduit for conveyinga master fluid, metering means connectible to said conduit and having a shaftrotatable at a speed corresponding with that of said master fluid, a second'shaft rotatable at a speed proportional to that of said first shaft, gearing connecting said shafts and manually changeable to alter the proportion of the speeds of said shafts, a pilot valve mechanically stroked by said second shaft at a cyclical frequency .proportional to the Yspeed thereof, a plurality of hydraulically operable impulse motors connected to said pilot valve and each of which is adapted to stroke once in each cycle of said pilot valve, a separate substance injecting means strokingly actuated by each of said impulse motors to inject substance into'said conduit, and individually adjustable means for controlling the length of stroke of each of said substance injecting means '7. In a proportioning system as set forth in claim6, in which at least one of said injecting means is enclosed within said conduit whereby all external leakage of its said substance is prevented.

8. In a fiuid treating apparatus, the combina- .tion of a main conduit through which a major uid may flow under pressure, means constituting a part of said conduit and dening asafety chamber through which the major fluid flows in its progress through the conduit, a Huid-injector located within said chamber, means extending into 'said chamber and connected to said injector to supply a second fluid to said injector under a negative pressure, said injector having its outspaanse 3 means adapted to build up pressure in a second uid and inject the same into the uid in said conduit, said injecting means having an inlet and an outlet, and being mounted with all the portions between said inlet and said outlet located within said safety chamber, and means for 5v actuating said injecting means.

JEFF CORYDON. 

